1 // SPDX-License-Identifier: GPL-2.0-only
3  * tmp007.c - Support for TI TMP007 IR thermopile sensor with integrated math engine
7  * Driver for the Texas Instruments I2C 16-bit IR thermopile sensor
9  * (7-bit I2C slave address (0x40 - 0x47), changeable via ADR pins)
78 	while (tries-- > 0) {  in tmp007_read_temperature()
79 		ret = i2c_smbus_read_word_swapped(data->client,  in tmp007_read_temperature()
90 		return -EIO;  in tmp007_read_temperature()
92 	return i2c_smbus_read_word_swapped(data->client, reg);  in tmp007_read_temperature()
97 	return i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG,  in tmp007_powerdown()
98 			data->config & ~TMP007_CONFIG_CONV_EN);  in tmp007_powerdown()
111 		switch (channel->channel2) {  in tmp007_read_raw()
112 		case IIO_MOD_TEMP_AMBIENT: /* LSB: 0.03125 degree Celsius */  in tmp007_read_raw()
113 			ret = i2c_smbus_read_word_swapped(data->client, TMP007_TDIE);  in tmp007_read_raw()
123 			return -EINVAL;  in tmp007_read_raw()
135 		conv_rate = (data->config & TMP007_CONFIG_CR_MASK)  in tmp007_read_raw()
142 		return -EINVAL;  in tmp007_read_raw()
158 				tmp = data->config & ~TMP007_CONFIG_CR_MASK;  in tmp007_write_raw()
161 				return i2c_smbus_write_word_swapped(data->client,  in tmp007_write_raw()
163 								data->config = tmp);  in tmp007_write_raw()
168 	return -EINVAL;  in tmp007_write_raw()
177 	ret = i2c_smbus_read_word_swapped(data->client, TMP007_STATUS);  in tmp007_interrupt_handler()
225 	switch (chan->channel2) {  in tmp007_write_event_config()
239 		return -EINVAL;  in tmp007_write_event_config()
242 	mutex_lock(&data->lock);  in tmp007_write_event_config()
243 	ret = i2c_smbus_read_word_swapped(data->client, TMP007_STATUS_MASK);  in tmp007_write_event_config()
244 	mutex_unlock(&data->lock);  in tmp007_write_event_config()
253 	return i2c_smbus_write_word_swapped(data->client, TMP007_STATUS_MASK,  in tmp007_write_event_config()
254 					data->status_mask = ret);  in tmp007_write_event_config()
264 	switch (chan->channel2) {  in tmp007_read_event_config()
278 		return -EINVAL;  in tmp007_read_event_config()
281 	return !!(data->status_mask & mask);  in tmp007_read_event_config()
293 	switch (chan->channel2) {  in tmp007_read_thresh()
294 	case IIO_MOD_TEMP_AMBIENT: /* LSB: 0.5 degree Celsius */  in tmp007_read_thresh()
307 		return -EINVAL;  in tmp007_read_thresh()
310 	ret = i2c_smbus_read_word_swapped(data->client, reg);  in tmp007_read_thresh()
328 	switch (chan->channel2) {  in tmp007_write_thresh()
342 		return -EINVAL;  in tmp007_write_thresh()
345 	/* Full scale threshold value is +/- 256 degree Celsius */  in tmp007_write_thresh()
346 	if (val < -256 || val > 255)  in tmp007_write_thresh()
347 		return -EINVAL;  in tmp007_write_thresh()
350 	return i2c_smbus_write_word_swapped(data->client, reg, (val << 7));  in tmp007_write_thresh()
449 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))  in tmp007_probe()
450 		return -EOPNOTSUPP;  in tmp007_probe()
453 		dev_err(&client->dev, "TMP007 not found\n");  in tmp007_probe()
454 		return -ENODEV;  in tmp007_probe()
457 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in tmp007_probe()
459 		return -ENOMEM;  in tmp007_probe()
463 	data->client = client;  in tmp007_probe()
464 	mutex_init(&data->lock);  in tmp007_probe()
466 	indio_dev->name = "tmp007";  in tmp007_probe()
467 	indio_dev->modes = INDIO_DIRECT_MODE;  in tmp007_probe()
468 	indio_dev->info = &tmp007_info;  in tmp007_probe()
470 	indio_dev->channels = tmp007_channels;  in tmp007_probe()
471 	indio_dev->num_channels = ARRAY_SIZE(tmp007_channels);  in tmp007_probe()
476 	 * 2. ALERT enable  in tmp007_probe()
480 	ret = i2c_smbus_read_word_swapped(data->client, TMP007_CONFIG);  in tmp007_probe()
484 	data->config = ret;  in tmp007_probe()
485 	data->config |= (TMP007_CONFIG_CONV_EN | TMP007_CONFIG_ALERT_EN | TMP007_CONFIG_TC_EN);  in tmp007_probe()
487 	ret = i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG,  in tmp007_probe()
488 					data->config);  in tmp007_probe()
493 	 * Only the following flags can activate ALERT pin. Data conversion/validity flags  in tmp007_probe()
503 	ret = i2c_smbus_read_word_swapped(data->client, TMP007_STATUS_MASK);  in tmp007_probe()
507 	data->status_mask = ret;  in tmp007_probe()
508 	data->status_mask |= (TMP007_STATUS_OHF | TMP007_STATUS_OLF  in tmp007_probe()
511 	ret = i2c_smbus_write_word_swapped(data->client, TMP007_STATUS_MASK, data->status_mask);  in tmp007_probe()
515 	if (client->irq) {  in tmp007_probe()
516 		ret = devm_request_threaded_irq(&client->dev, client->irq,  in tmp007_probe()
519 				tmp007_id->name, indio_dev);  in tmp007_probe()
521 			dev_err(&client->dev, "irq request error %d\n", -ret);  in tmp007_probe()
559 	return i2c_smbus_write_word_swapped(data->client, TMP007_CONFIG,  in tmp007_resume()
560 			data->config | TMP007_CONFIG_CONV_EN);  in tmp007_resume()